Safety stop for double seamers



May 15, 1923. 3,454,876

M. E. WIDELL V SAFETY STOP FOR DOUBLE SEAMERS l7 1920 2 Sheets-Sheet 1 May 15, 11923;

M. E. WIDELL SAFETY STOP FOR DOUBLE, SEAMERS 2 Sham-Shoat 2 Filgd Nov. 1 7. 1920 MAG-NUS E. WIDELL, OF HAYWOOD, ILLINOIS, ASSIGNOB TO AMERICAN CAN COMPANY,

OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

SAFETY STOP FOR DOUBLE SEAME'RS.

Application flied November 17, 1920. Serial No. 424,696.

To all whom it may concern:

Be it known that'I, MAGNUS E. WmnLL, a citizen-of the United States, residing in Ma wood, in the county of Cook and State of llinois,'have invented anew and useful Improvement :in Safety Stops ;for Double Seamers, of which the following is a specification.

This invention relates in general to machines for seaming can ends to-can bodies, and more particularly to means in such a machine for automatically stopping its action when the cans are not properly ejected" or when they are jammed or impeded in their normal movement.

A principal object of the invention is the provision of an automatic device for the purpose stated, adapted to be used upon anapparatus described in copending appIlication of myself and A. A. J ahr, Serial 0. 424,697, and known as a horizontal stationary can double seamer for non circular cans.

Another important object of the invention is the rovision of a device of this kind adapte to operate in conjunction with another stopping device regularly used upon said machine to stop its actionupon detecting the absence of a can end in proper seaming relation with its companion body, said devices utilizing many of the same parts.

A further object of the invention is the provision of, instantly acting means of this character whereby danger to, attendants is minimized, smooth operation of the machine is insured, and damage to its parts through faulty operation rendered improbable.

A still further object of the invention is the provision of a device accomplishing these and other objects, and consisting of few and easily accessible parts, all of which are of simple construction and unllkely to require frequent repair or replacement.

Numerous other objects and advantages of the invention will be apparent as it is better understood from the following description when considered in connection with the accompanying drawings illustrating a preferred embodiment thereof.

Referring to the drawings,

Figure 1 is a rear view of a horizontal stationary can double seamer for non-circular cans showing my safety stop attached;

Fig. 2 is a fragmentary side elevation thereof; and

Fig. 3 is an enlarged section taken substantially on the line 33 in Fig. 2.

For the purpose of'illustra'ting my invent1on I" have shown on the drawings an apparatus in .which .it is' embodied, showing onlythe parts necessary to an understandin of my improvement.

eferring first to Fig.2, it will be noted that there is shown an actuator 11 of a Geneva movement and a star wheel or driven part 12. A shaft 13, upon which the actuator is mounted, is driven by a main power shaft 14'bv means of gearing not shown in detail. A shaft 15 is turned by the wheel 12, mounted thereon, and intermittently advances a turret or carrier 16, which receives the can bodies from a chute 17 and turns them into position upon a chuck-'18 to have can ends, fed from a stack holder 19, seamed thereon. It will be understood that this intermittent movement of the turret is accomplished through the Geneva movement mentioned operating in the usual manner, i. e.,' the actuator 11 continuously revolves on its shaft and as the peripheral surface 21 engages in one of a plurallty of recesses 22 the wheel 12 is held fast. When said actuator has turned in counter clockwise direction so that'its concave surface 23 is engaged by points'25 of the star wheel, and an arm 26 engages in a slot 27, said wheel is advanced until the next recess 22 is engaged by the actuator.

The manner in which my invention accomplishes the stopping of' the action of a machine when movement of the cans is impeded will now be described. The wheel 12 frictionally engages a fibrous collar 32 (Fig. 3) which fits tightly upon a sleeve 35 contactin with the shaft 15 and keyed thereto by a ey 30, as may be seen in Fig. 3. This engagement is sufficient normally to drive the shaft. When the turret is stopped by jamming of the cans, however,the shaft is held fast des ite continued movement of the wheel 12. is continued movement of the Wheel 12 turns a cam ring 40 secured thereto (Fig. 3) and causes a cam 34 formed in the outer edge of said ringto operate. on a similar cam surface of an outer shell 33. This shell is connected with the shaft 15 so as to be held from rotation when the shaft is so held, so that the shell is forced outward bv said cam action in a direction'axially of the shaft. This forces outwardly an arm 36 piv at 46 upon a bell crank 57, a pawl 48 being secured on said pivot and rigid with the arm 45.

An arm 52, loose on a shaft 51, is provided with a roller 53 engaging a cam 54 upon a shaft 55. The movement of said roller upon said cam intermittently brings-a notch 56 on the arm 52 into position to be engaged by the pawl 48 when the latter is actuated and forced downwardly by thearm 45 in case of a jam causing my device to operate. This results in actuation of the bell crank 57, which is carried on the shaft 51 and connected by a link 58 with a clutch arm 61- upon avclutch 62 on the main power shaft of the machine, thus disconnecting said clutch and stopping the action of the entire ap aratus.

t will be noted that I have provided a spring 63 upon the link 42 held thereon between a collar 64 and the end of the arm 36. The purpose of this is to permit immediate throw out of the arm 36 upon the occurrence of a jam even though the arm 52 is not at the instant in such position that the notch 56 can engage the pawl 48. As pre viously stated, the arm 36 is loosely connected to the link and may be forced outwardly by the spring, pending movement of the roller 53 on the cam 54, bringing the notch 56 into engaging position, thus maintaining the pawl in its notch-engaging position.

Manual means are rovided to again connect the clutch and t ese comprise a rod 65 pivoted at 66 with the bell crank 57 and to an arm 67 on a verticalshaft 68 which is provided with'a hand lever 69 extending through the apparatus and out at the front.

It will be understood that my device utilizes'many of the parts comprising means for stoppin i.e., when the can ends and bodies are not fed in proper seaming relation. A rod-71 has a bearing in the frame 72 immediately in front of the path of the can ends. It is pivotally connected to an arm 73 upon a shaft 74. This shaft carries at its opposite end an arm 75 )ivoted to a vertically moving link 76, which is connected at its lower end with a part of the mechanism of the lower portion of the double seamer which is convenient for causing it .to reciprocate thus causing the detector rod 71 to project periodically into the path of the can end movement. If a can end be present it resists said rod and causes compression of a spring 77 held on the link 76 between a collar 81 and a bearing lock on the means causthe machine in another event,

ing the link to reciprocate. In case a can end is not present, this compression does not take place and the inward movement of the rod 71 causes a lever 82, loosely connected with the link 76 and pivoted at 83 on the frame of the machine, to move a link 84 connected with an arm 47 and thus lowers the pawl 48 to notch-engaging position and the clutch is disconnected as previously described. The combination of these two stopping devices adds greatly to the efliciency of the machine.

It is thought that the invention and many of its attendant advantages will be understood from the foregoing description, and it Will be apparent that various changes may be made in the form, construction and arrangement of the parts without departing from the spirit and scope of the invention or sacrificing its material advantages, the form hereinbefore described being merely a preferred embodiment thereof.

I claim:

1. In a machine for seaming flanged can ends to flanged can bodies, automatic means for stopping the action of the machine when normal movement of the cans therein is impeded, said automatic means comprising a driving element and a driven element having a .frictional driving engagement, and means whereby the relative movement of said driving element disconnects from itself the power mechanism.

2. In a machine for seaming flanged can ends to flanged can bodies, automatic means for stopping the action of the machine when normal movement of the cans therein is impeded, said means comprising, in combination a can-carrier driving shaft, an independently operated driving wheel mounted thereon and having a yielding drivingconnection with said shaft, and means for terminating transmission of power to the machine upon the yielding of said driving connection between said shaft and wheel.

3. In a machine for seaming flanged can ends to flanged can bodies, a safety! stoping device comprising a can-carrier driv-. ing shaft, a driving wheel mounted thereon and havin a frictional yielding driving connection wlth said shaft, and means comprising a female cam member integral with said wheel, and a horizontally movable male cam member secured against independent rotation upon said shaft, for disconnecting the machine from its power in case of nonsynchronous movement of said shaft and wheel resulting from accidental retardation of saidushaft, and a clutch for connecting the machine with its power, and means whereby said horizontally movable cam member causes the disconnection of said clutch 4. In a machine for seaming flanged can ends to flanged can bodies, a power mechanism and means for disconnecting said mechanism upon jamming of the cans in the machine, said means comprising a can-car- :such failure to transmisslon of power to rier driving shaft and driving member on said shaft and having a frictionally yielding driving connection with said shaft, and inde endent members u on said shaft and drivmg member adapte to interact to produce disconnection of said power mechanism upon failure of said shaft and driving member to move in unison, and a clutch for. connecting the machine with its power, and means whereby the interaction-of said independent members causes the disconnection of said clutch.

5. In a machine for seaming flanged can ends toflanged can bodies, a safety stopping device comprising cam members operating on failure of the machine to properly function, a driving element connected with one of said cam members, a driven element connected with the other of said cam members, and having a frictional driven connection with said driving element, lever and connecting members operated b said cammembers, a power clutch an clutch disconnectmg means en aged thereby, in case of ction, for terminating said machine.

'6. In a machlne for seaming'flang'ed can ends to flanged can bodies, a safety stopping device. comprising cam members operating upon the jamming of cans in the machine, a

driving element connected with one of said cam members, a driven element connected withthe other of said cam member-sand having a yielding driving connection with said driven member, connectingmembers actuated by the cooperation of said cam members, a power clutch and' means for disengaging said clutch and terminating transmission power to the machine, said means comprising a cam-oscillated arm, a .pawl normally held above said arm and adapted to be arranged in engagement therewith by said connecting members, and clutch disconnecting members operatmgupon such enga ement.

In a machine for seaming flanged can ends to flanged can bodies, the combination of means for stoppin the machine when movement of the can Iiodies therein is impeded, and members'for accomplishing a similar result when a can body is arranged at a predetermined point without a companion end, said means comprising in common-a cam-oscillated arm, a clutch and a clutch control comprising a pawl, normally held above said arm and adapted to be arranged in engagement therewith, and actuating members operating upon such engagement to operate saidclutch andflisconnect the machine from its power in either event mentioned.

MAGNUS E. 

